Undo of delete/forward-delete of text should not select the deleted text on non-mac platforms

Source/core/editing/EditingBehavior.h

Index: Source/core/editing/EditingBehavior.h
diff --git a/Source/core/editing/EditingBehavior.h b/Source/core/editing/EditingBehavior.h
index 6c2f994cd6f375799b112bf0ce872aa2bdfe68ee..395ebe6a6bbf46abcf98110e28eb0e70c4533f13 100644
--- a/Source/core/editing/EditingBehavior.h
+++ b/Source/core/editing/EditingBehavior.h
@@ -79,6 +79,10 @@ public:
     // But ctrl+right arrow moves caret to "abc |def |hij |opq" on Windows and "abc| def| hij| opq|" on Mac and Linux.
     bool shouldSkipSpaceWhenMovingRight() const { return m_type == EditingWindowsBehavior; }
 
+    // On Mac, undo of delete/forward-delete of text should select the deleted text. On other platforms deleted text
+    // should not be selected and the cursor should be placed where the deletion started.
+    bool shouldUndoOfDeleteSelectText() const { return m_type == EditingMacBehavior; }
+
 private:
     EditingBehaviorType m_type;
 };